PET resin mold processed goods

ABSTRACT

Utilizing PET resin which has improved fluidity and enabling injection molding with co-polymerization and compound technology, the hinge being the thinnest part of thickness more than 0.2 mm, the main body and the lid made with one solid mold method, which is a container that can be opened and closed and sealed, and is transparent, to be used as medical usage container and in physics and chemistry experiments. Sheet can be sealed in the inside of the container, sealed completely in a bag and sterilized with radiation. The slide glass has the hollow round part on the surface made and molded simultaneously, having a lid which can closed and sealed via a hinge made with one solid mold method. Also the slide glass is made as sterilized. The spectacle is made with one solid mold method wherein the lens, lens frame, and the side frames are all made as one mold from PET resin. The temperature setting of the cylinder of the injection molding machine is set at 240 to 285 degrees centigrade, and the speed of the injection mold is set at low to middle speed. Window glass, light shade, tableware, roof tile, helmets and such are made as one with solid mold method with the PET resin. From above, this invention provides medical apparatus with lids, disposable physics and chemistry experiment tools with lids, sterilized slide glass with hollow part with lid, solid molded spectacle, window glass with convex concave patters and designs with window frame and locks, light shades, tableware, roof tiles, helmets and such, all made from PET resin which has improved features of higher flexibility, high transparency, radiation proof, and high shockproof property, being suitable for mass production at affordable cost.

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] This invention relates to mold processed goods utilizing PETresin.

[0003] 2. Description of the Prior Art

[0004] Conventionally, material for resin were PC (polycarbonate), PP(polypropylene), PE (polyethylene), PS (polystyrene), and PET(polyethylene terephthalate) was not suitable for resin material forinjection molding method due to its bad fluidity (in molding). Thereforealthough PET had good features such as transparency and shockproofproperty, PET was used in limited areas in flat plate processing such asblister packs and PET bottles using vacuum mold or blow mold processingmethods. The injection mold with PET material is possible to some extentwith temperature management of gate and the mold shape (for example,refer to Patent Document 1). Also, there have been modifications doneonto PET resin to improve its transparency and heatproof property (forexample, refer to Patent Documents 2, 3, 4 and 5).

[0005] Recently, there have been some proposals of PET resin materialthat has improved properties of fluidity, shockproof, transparency andheatproof features (for example, refer to Patent Document 6 and 7).

[0006] Patent Document 1

[0007] Patent publication 6-846

[0008] Patent Document 2

[0009] Patent publication 8-309833

[0010] Patent Document 3

[0011] Patent publication 7-171868

[0012] Patent Document 4

[0013] Patent publication 2000-302114 (P2000-302114A)

[0014] Patent Document 5

[0015] Patent publication 11-105059

[0016] Patent Document 6

[0017] Patent publication 2003-48967 (P2003-48967A)

[0018] Patent Document 7

[0019] Patent publication 2003-64167 (P2003-64167A)

[0020] There have been no proposals for products made of PET resin withhinges made of solid mold method.

[0021] Majority of containers for medical apparatuses are made of PP,PS, or of PE resin, but PS goods are easy to break, and PE goods lacktransparency. It is a usual practice that sterilized goods are wrappedwith external packaging or to have double wrap packaging.

[0022] Majority of containers made from transparent resin in moldprocessing are made of PC, PP, PS or of PS, and many of the main part ofdisposable physics and chemistry experiment apparatuses are made ofthese resins, and lids of these apparatuses are made separately.

[0023] As for slide glasses, there are no resin ones but only glass onesdue to transparency and price. There are no sterilized slide glasses.

[0024] Lens, lens frames and side frames are made of resin, but thereare no spectacles made of solid mold processing where the parts are madefrom one mold.

[0025] Vertical joint glass needs to have the center to be sealed aftercaulking with silicon and such. Expensive processing is necessary whendeformed wave and other patterns and designs, characters are to beprocessed onto a window glass.

[0026] As for light shades and tableware, most are disposable made of PSor PP when made of resin.

[0027] There have been no resin roof tiles made of PET resin material,and there are no transparent roof tiles.

[0028] There have been no PET resin material utilized in resin madehelmets, and there are no transparent helmets.

[0029] The material of PC is expensive, and is not suitable foraffordable mass production goods. Although the hardness is assured, PCmaterial is easy to break when made into thin plate forms such as inhinges. PP and PE material lack transparency even after polishing. Alsothese material lack intensity, and are not suitable for goods that bearheavy burden. Also PP material changes color when exposed to radiationrays and the quality deteriorates. PS has weak shockproof property, andbreaks when dropped. PET has had bad fluidity (molding feature) and wasnot suitable for injection molding.

[0030] In cases of disposable physics and chemistry experimentapparatuses with lids, the main body and the lid usually different partsor sold separately as in test tube caps.

[0031] There are only glass made slide glasses, but the edge of theslide is dangerous being sharp, and it breaks when dropped. There is noslide glass with lid cover, and when a cover glass is placed on top of aslide glass to sandwich the sample, the location of the sample tends toshift and the sample may spill over. Forming the round hollow part toplace a sample on the slide glass is very expensive. There are nosterilized slide glasses.

[0032] When a pair of spectacles is dropped, expensive lens breaks.Light-weight steel frames are deformed easily.

[0033] When embossed processing is done on window glass, expensiveprocessing is necessary. Also a regular window glass break easily with ahammer and is not a preferable material in terms of crime prevention.

[0034] Light shades and tableware made of glass are weak against shock,and are easily broken. Resin made shades and tableware lack the sense ofhigh class.

[0035] When a skylight is to be made onto a rooftop, the roof tile ofthat portion is removed to place aluminum frame glass, thus the eleganceof roof tiles is lost. When placing a solar panel, the only way is toplace it above the roof tiles, and this also spoils the elegantatmosphere of roof tiles.

[0036] ABS or PPS resin used for helmets are affordable and are suitablefor mass production, but lacks shockproof property. PC material isexpensive and is not suitable for mass production. Although PC materialhas hardness, it is easily broken when made into thin plate form.

SUMMARY OF THIS INVENTION

[0037] To solve the above issues, this invention proposes goods made ofmodified PET resin material, wherein the fluidity is improved andinjection molding made possible due to utilization of co-polymerizationand compound technology, and to produce products which were consideredto be impossible with conventional injection molding method. With thisinvention, there is more freedom in its design, enabling processed goodswith high transparency and good shockproof property. The whole body ofthe item can be made of one solid mold method with a hinge, wherein thethickness of the hinge part is set to be more than 0.2 mm at thethinnest part, and the PET resin with high flexibility functions as ahinge.

[0038] This invention proposes the thinnest part of the hinge to be in aplate form with its thickness more than 0.2 mm, the thickness increasingfrom the peak line in a tapering form, and the plate made in a circlecylinder form. There could be one portion of the thinnest part of thehinge or multiple portions with the thinnest part. These hinges enableappropriate spring property, the main body and the lid can be made withsolid mold method, providing transparent containers with smooth openingand closing features.

[0039] This invention is made into containers to contain and packdisposable medical apparatuses, which can pack the used apparatuses attimes of disposal, the package can be sealed and be disposed. Thiscontainer has sterilized paper, film, Tyvek and such sheet which can besterilized, the sheet is placed at the top part of the main body whereina used apparatus is to be contained, the sheets to be sealed withheat-seal procedure, a lid is closed from above, enabling air tightnessand aseptic state. Furthermore, the whole part can be covered withbag-like package which can be sterilized, which is heat-sealed, enablingdouble packaging to provide further air-tightness and aseptic state,assuring further safety.

[0040] Apparatuses used in physics and chemistry experiments such astest tubes, Messzylinder, liquid measure, beaker, petri dish, cup, bloodcollecting tube, disposable cell, reagent bottle, sediment tube,centrifuge tube, can be made with modified PET resin, made with solidmold method with lid connected to the main body, wherein the apparatusescan be sealed with the lid after content is placed inside, to proceedwith the experiment or for storage. As PET resin is radiation proof, theapparatus can be handled after radiation sterilization.

[0041] When slide glass for placing samples for microscope observationand storage is made of PET resin made from injection mold method, around hollow for placing the sample can be made on the surface of theoblong plate easily. With a hinge the slide can have a lid with whichthe slide can be sealed completely. The transparency is also high. Sucha slide glass can be sterilized.

[0042] In cases of spectacles, the lens, the lens frame, and the sideframe can be made with solid mold method with PET resin. The hinge ofthe lens frame and side frame are connected, with high flexibility andis light in weight. This can be mass produced at affordable cost.

[0043] When goods with hinges utilizing PET resin material is made ofinjection mold, the setting of the injection mold cylinder will be setat 240 to 285 degrees centigrade, the speed of injection to be set atlow to middle speed, for molding.

[0044] Another method is to form a hinge with projection molding method,wherein the projected material is embossed with vacuum mold processing.

[0045] Window glass made of PET resin can have wave form or verticalcombined deformed window or with patterns and designs, with embossedcharacters and other such ornamentation is possible with the specificfeatures of injection molding. The window frame, the handle or the lockparts can be made together with the window glass in solid moldprocessing method.

[0046] Light shades and tableware made of PET resin have much freedom inthe design aspect, with strong shockproof property, high transparency,does not deform with heat, and are affordable.

[0047] Transparent roof tiles made of PET resin also have much freedomin the design aspect, with strong shockproof property, hightransparency, enabling a skylight to be set on the roof tile. Also asolar panel can be inserted and molded.

[0048] Helmets made of PET resin have much freedom in the design aspect,with strong shockproof property, high transparency, enabling safe fieldof vision.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0049] Hereafter, a description of the preferred embodiments of thisinvention is made in reference to drawings. FIG. 1 shows a container ofa sterilized medical apparatus (a wire system for sternum suture).Gimlets for sternum piercing 1 a and 1 b are stored inside the main bodypart of PET resin container made of injection molding method. Wire 3 isstored around the gimlets 1 a and 1 b. Hinge 4 is made of a plate withthickness of 0.3 mm at the thinnest part, the main body and the lid areconnected with the hinge 4 with solid mold method and can be opened andclosed smoothly. The main body and the lid are molded in a state wherethe main body and the lid are open at 180 degrees. When the main bodyand the lid are closed, approximately 0.15 mm of the hinge breaks, andthe remaining 0.15 mm obtains appropriate spring features. When thethickness of the hinge is set at less than 0.2 mm, the hinge breaks whenopened and closed only once, but if the thickness is 0.3 mm, the hingebears a few hundred times of opening and closing at 180 degrees whenopened. After the gimlets are used, the gimlets are stored to theoriginal position handled as contagious medical waste, lock 5 is lockedand the container is sealed. As the transparency is high, the handlingof used risky waste can be conducted easily. The sealant feature ishigh, with a strong shockproof property, with no concern of bloodleakage or infection. As proposed in Claims 6 and 7, by providing Tyveksheet with heat seal process on tope of the main part of the container,the inside of the container can be sealed completely. By closing the lidon top of that, the air-tightness and the aseptic aspect can beimproved. As the air-tightness is assured, radiation (gamma rays)sterilization is more suitable than ethylene oxide gas sterilization. AsPET resin is radiation proof, this material does not deteriorate orchange color though used for a long term. When the whole container isseal packed with a Tyvek bag, further air-tightness, antiseptic featureand safety can be assured.

[0050]FIG. 2 shows a test tube with a cap utilized in physics andchemistry experiments according to Claims 3 and 4. PET resin isprocessed with injection mold method, main body 6 is connected as onewith lid 7 via hinge 8. The thinnest part of hinge 8 has the thicknessof 0.3 mm, the thickness increasing in a tapering form from the peakline. Main body 6 has a high transparency, and it is easy to confirm thesample visually. The lid can be closed easily, and the sealant featureis high. As this apparatus is made with solid mold method, massproduction at affordable cost is possible. It is also possible to wrapand seal the whole apparatus with sterilized packaging, and have theapparatus as gamma rays sterilized apparatus.

[0051]FIG. 3 shows an example of a slide glass according to Claims 5 and6. This slide glass is made of PET resin made from injection mold, themain body 9 is connected as one unity in solid mold method with lid 10via hinge 11. The thinnest part of the hinge has the thickness of 0.3mm, wherein a plate of that thickness is formed into a cylindricalshape. Different from a glass material, the edge is smooth and safe. Theslide does not break even when dropped. This has high transparency, andit is easy to confirm the sample visually. The hollow part 12 in themiddle of the slide is to stabilize the sample. With lock 13, the slidecan be sealed and stored easily and definitely. As the slide can besterilized, the sample will not be infected with bacteria reproduction.As the slide is made of solid mold method, mass production as affordablecost is possible.

[0052]FIG. 4 shows a pair of spectacles according to Claim 7. PET resinmaterial is molded with injection mold, and the lens 14 a, 14 b and lensframe 15 are made as solid mold with side frame 16 a, 16 b via hinge 17a and 17 b. The thinnest part of the hinge has the thickness of 0.3 mm,wherein a thin plate is made into a cylindrical form. As this isshockproof, the spectacles do not break so easily even when dropped.Lens 14 and 14 b has high transparency as high as glass. This materialis suitable for correction of vision impairment for farsightedness andsuch disabilities of that are uniformed to some extent. This can be massproduced at affordable cost.

[0053] Other goods with hinges made of injection molded PET resin inmedical field are; surgical tool case, medication box, pill case; inother fields; electric parts, tools, tool case, carrying case,briefcase, disc cases for CDs, DVDs and such.

[0054] As explained above, this invention can provide PET resin goodswith hinge which is shockproof, has high flexibility, high transparency,made in mass production at affordable cost. When made into a containerfor containing disposable medical apparatus, visual confirmation iseasily done to confirm and dispose the risky content as the transparencyis high. This invention can offer high sealant feature, strong againshock, and there is no concern for blood leakage or infection. Whensterilized sheet is heat-sealed within the container, furtherair-tightness and antiseptic aspect is assured, and when the outside ofthe container is sealed with a Tyvek bag, further antiseptic aspect isobtained and also as the bag is not double fold, the external packagingis made compact, and the total medical waste volume can be reduced.

[0055] Apparatuses used in physics and chemistry experiments such astest tubes, Messzylinder, liquid measure, beaker, petri dish, cup, bloodcollecting tube, disposable cell, reagent bottle, sediment tube,centrifuge tube, can be closed and sealed after placing the contentinside, with the lid which is made in solid mold method, for furtherexperiment testing or for storage. As PET resin is strong againstchemical substances, this material is suitable for all kinds of samples.As there is no need to purchase separate stopper or plug, this materialcan contribute to reduce experiment expense. As this material has hightransparency, it is easy to confirm the content visually. As PET resinmaterial is radiation proof, apparatus made of this PET resin can besterilized with radiation, and can be used immediately for aseptictests. This material has stronger shockproof property compared to glass,there is less concern for breakage.

[0056] When slide glasses are made of PET resin from injection mold, theslide glass for microscope observation of samples and for storage, acircular hollow for placing samples on the oblong slide surface caneasily be molded. It is also possible to have a lid to be made in solidmold method sealing the lid. When erythrocytes are placed on the slide,the hollow will prevent the red blood cells from damage, and the naturalstate of the cells can be observed. Such slide has high transparency andhas high visibility. When the slides are made as sterilized slides,there will be no concern for the risk of the patients' infection as theslide glass surface is placed directly on the patients' finger tip skin,and there will be no risk of bacteria on the slides. Such slides do notbreak easily even when dropped, and there is less risk of injury due tothe edge of the slides. As the slides are made of solid mold method,mass production at affordable cost is possible.

[0057] When spectacles are made of PET resin made from solid moldmethod, enabling mass production at affordable cost. Spectacles for farsightedness are suitable for mass production, as there is limited numberof lens specs. These spectacles do not break even when dropped, and areless susceptible for deformation. As the transparency is as high asglass, the visual capability of such PET resin made spectacles is high.Such spectacles are light in weight compared to metal frame spectacles,and as heat conductivity is low, there is less change in skin contacttemperature when wearing.

[0058] Window glass made of PET resin enables many types ofornamentation such as wave pattern, vertical combination deformedwindow, or windows with other patterns and designs such as embossedcharacters. Also, when the window is made in solid mold method togetherwith window frame, handle and lock parts, the expense can be lowered dueto less parts cost and labor cost. Different from glass, such PET resinwindow would not break so easily with a hammer, and so it is suitablefor crime proof. In cases of earthquakes and disaster, there will beless concern of injury due to glass fragments. As heat conductivity ofPET resin is low, such window will be more comfortable in hot summerseason, and there is less condensation in wintertime. As thetransparency is high, such window material will not hamper the view.

[0059] Light shades and tableware made of PET resin have high freedom inthe design aspect, with strong shockproof property, high transparency,does not deform with heat, and mass production is possible at affordablecost. Compared to glass, PET resin material is light-weighted, and asthe heat conductivity is low, less heat from light shades are conductedeven in hot summertime. In cases of tableware, PET resin material isgood for keeping warm food, and also easy to carry. Cold food kept inPET resin tableware would not get warm, and the surrounding do notcondensate so much as other material.

[0060] Transparent roof tiles made of PET resin have much freedom in thedesign aspect, with strong shockproof property, high transparency andtherefore a skylight can be placed within the roof tile. Heat insulationeffect in summertime is also high. Also power generation type solarpanel can be inserted and molded. As transparency is high, solar heatcan be absorbed in solar panel effectively. As PET resin material hashigh shockproof property, there is less concern of breakage.

[0061] Helmets made of PET resin have high freedom in designing, goodshockproof property, high transparency, and safe and wide angle view.

BRIEF DESCRIPTION OF THE DRAWINGS

[0062]FIG. 1 is an explanatory drawing of an embodiment of a disposablemedical apparatus made of PET resin.

[0063]FIG. 2 is an explanatory drawing of an embodiment of an experimenttest tube with a cap, made of PET resin.

[0064]FIG. 3 is an explanatory drawing of an embodiment of a slide glasswith a lid, made of PET resin.

[0065]FIG. 4 is an explanatory drawing of an embodiment of a pair ofspectacles made of PET resin.

What is claimed is:
 1. PET resin hinge processed goods, made of solidmold method consisting of one part, utilizing PET resin raw materialwith improved fluidity, higher transparency, and stronger shockproofproperty modified with co-polymerization and compound technology,wherein the thinnest part of the hinge is more than 0.2 mm, and theparts connected to the hinge is set thicker than the thinnest part. 2.PET resin hinge processed goods according to claim 1, wherein thecross-section of the thinnest part of the hinge is in a plate form withthickness being more than 0.2 mm, there being one or more thin hingeparts.
 3. PET resin hinge processed goods according to claim 1, whereinthe cross-section of the thinnest part of the hinge is in a linear form,with the thickness becoming gradually thicker to both sides in taperform from the peak line, there being one or more thin hinge parts. 4.PET resin hinge processed goods according to claim 1, wherein thethinnest part of the hinge is a circular form rolling a flat plate withthickness of the thinnest part being more than 0.2 mm.
 5. PET resinhinge processed goods according to claims 1, 2, 3 and 4, which is acontainer to contain and pack disposable medical apparatus, to re-packused apparatus at time of disposal, then the apparatus is sealed anddisposed.
 6. PET resin hinge processed goods for packing used disposablemedical apparatus according to claim 5, which is a sterilized medicalapparatus container which can be sealed and wrapped conducting heat-sealprocess of sheets which can be sterilized, sheets such as sterilizedpaper, film, or Tyvek on the top part of the main part where anapparatus is to be contained, to improve air-tightness and antisepticfeature, sterilized with ethylene oxide gas or radiation sterilizationto improve air-tightness and antiseptic features.
 7. PET resin processedgoods for packing disposable medical apparatus according to claim 6,which is a sterilized medical apparatus container which can be sealedand wrapped conducting heat-seal process of sheets which can besterilized, sheets such as sterilized paper, film, or Tyvek on the toppart of the main part where an apparatus is to be contained, to improveair-tightness and antiseptic feature, the lid is closed and the wholeexternal part is furthermore sealed with heat seal with bag-likewrapping material which can be sterilized such as sterilized paper,film, Tyvek and such.
 8. PET resin hinge process hinge goods accordingto claims 1, 2, 3 and 4, which are apparatuses used in physics andchemistry experiments such as test tubes, Messzylinder, liquid measure,beaker, petri dish, cup, blood collecting tube, disposable cell, reagentbottle, sediment tube, centrifuge tube, these apparatuses which can beclosed and sealed after placing the content inside, with the lid whichis made in solid mold method, for further experiment testing or forstorage.
 9. PET resin physics and chemistry experiment apparatusesaccording to claim 8, wherein the whole apparatus is sealed and packedinside a packaging which can be sterilized such as sterilized paper,film, Tyvek and such, sterilized with ethylene oxide gas or radiation.10. PET resin hinge processed goods according to claims 1, 2, 3 and 4,which is a slide glass for microscope observation and storage ofsamples, which has a hollow circle on the surface of the oblong slide onwhich to place the sample, and which can be closed and sealed with a lidwhich is solid molded via a hinge.
 11. PET resin slide glass accordingto claim 10 wherein the whole slide is wrapped and sealed with apackaging which can be sterilized such as sterilized paper, film, orTyvek and such, and is sterilized with ethylene oxide gas or radiation.12. PET resin hinge processed goods according to claims 1, 2, 3 and 4,which is a pair of spectacles that is made of solid mold method havingthe lens, lens frame, and the side frame are all made from one mold,there being a hinge between the lens frame and the side frame, and canbe mass produced at affordable cost.
 13. A manufacturing method of PETresin hinge processed goods according to claims 1, 2, 3, 4, 6, 7, 9 and11, which is a method to manufacture and process hinge processed goodswith injection mold method from PET resin raw material, wherein thetemperature of the cylinder of the injection molding machine is set at240 to 285 degrees centigrade, the speed of the injection is set at lowto middle speed.
 14. A manufacturing method of PET resin hinge processedgoods according to claim 5, which is a method to manufacture and processhinge processed goods with injection mold method from PET resin rawmaterial, wherein the temperature of the cylinder of the injectionmolding machine is set at 240 to 285 degrees centigrade, the speed ofthe injection is set at low to middle speed.
 15. A manufacturing methodof PET resin hinge processed goods according to claim 8, which is amethod to manufacture and process hinge processed goods with injectionmold method from PET resin raw material, wherein the temperature of thecylinder of the injection molding machine is set at 240 to 285 degreescentigrade, the speed of the injection is set at low to middle speed.16. A manufacturing method of PET resin hinge processed goods accordingto claim 10, which is a method to manufacture and process hingeprocessed goods with injection mold method from PET resin raw material,wherein the temperature of the cylinder of the injection molding machineis set at 240 to 285 degrees centigrade, the speed of the injection isset at low to middle speed.
 17. A manufacturing method of PET resinhinge processed goods according to claim 12, which is a method tomanufacture and process hinge processed goods with injection mold methodfrom PET resin raw material, wherein the temperature of the cylinder ofthe injection molding machine is set at 240 to 285 degrees centigrade,the speed of the injection is set at low to middle speed.
 18. Amanufacturing method of PET resin mold processed goods according toclaims 1, 2, 3, 4, 6, 7, 9 and 11, which is a method to form the hingeshape according to claims 2, 3 or 4, and the pressed out material isshaped into convex and concave forms with vacuum molding method.
 19. Amanufacturing method of PET resin mold processed goods according toclaim 5, which is a method to form the hinge shape according to claims2, 3 or 4, and the pressed out material is shaped into convex andconcave forms with vacuum molding method.
 20. A manufacturing method ofPET resin mold processed goods according to claim 8, which is a methodto form the hinge shape according to claims 2, 3 or 4, and the pressedout material is shaped into convex and concave forms with vacuum moldingmethod.
 21. A manufacturing method of PET resin mold processed goodsaccording to claim 10, which is a method to form the hinge shapeaccording to claims 2, 3 or 4, and the pressed out material is shapedinto convex and concave forms with vacuum molding method.
 22. PET resinwindow glass utilizing PET resin raw material which has improvedfeatures of fluidity, transparency and shockproof properties due toco-polymerization and compound technology, made into resin window glasswith injection molding, having special features of wave shapes, verticalcombination deformed windows, with patterns and designs, or withembossed characters utilizing the features of injection molding.
 23. PETresin window glass according to claim 9 wherein the window frame, thehandle, and the lock parts are all made together with the window as onesolid mold.
 24. PET resin light shade utilizing PET resin raw materialwhich has improved features of fluidity, transparency and shockproofproperties due to co-polymerization and compound technology, made intoPET resin light shade with injection molding, having special features ofhigh freedom of design aspect, good shockproof properties, hightransparency, enabling mass production at affordable cost.
 25. PET resintableware utilizing PET resin raw material which has improved featuresof fluidity, transparency and shockproof properties due toco-polymerization and compound technology, made into PET resin tablewarewith injection molding, having special features of high freedom ofdesign aspect, good shockproof properties, high transparency, enablingmass production at affordable cost.
 26. PET resin roof tile utilizingPET resin raw material which has improved features of fluidity,transparency and shockproof properties due to co-polymerization andcompound technology, made into PET resin roof tile with injectionmolding, having special features of high freedom of design aspect, goodshockproof properties, high transparency, enabling mass production ataffordable cost.
 27. PET resin transparent roof tile according to claim26, wherein an electrical generating solar panel is inserted and molded.28. PET resin helmet utilizing PET resin raw material which has improvedfeatures of fluidity, transparency and shockproof properties due toco-polymerization and compound technology, made into PET resin helmetwith injection molding, having special features of high freedom ofdesign aspect, good shockproof properties, high transparency, enablingmass production at affordable cost.